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1929 Grand Banks Earthquake
The 1929 Grand Banks earthquake (also called the Laurentian Slope earthquake and the South Shore Disaster) occurred on November 18, 1929. The shock had a moment magnitude of 7.2 and a maximum Rossi–Forel intensity of VI (''Strong tremor'') and was centered in the Atlantic Ocean off the south coast of Newfoundland in the Laurentian Slope seismic zone. Earthquake The earthquake was centred on the edge of the Grand Banks of Newfoundland, about south of the island. It was felt as far away as New York City and Montreal. The quake, which occurred along two faults south of the Burin Peninsula, triggered a large submarine landslide displacing (). It snapped 12 submarine transatlantic telegraph cables and led to a tsunami that arrived in three waves. Newfoundland, Canada and Saint Pierre and Miquelon had the largest impact, both from the snapped 12 submarine cables, and the tsunami. This was Canada's largest submarine landslide ever recorded, up to 500 times the size of 1894 Sain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often use the term "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturatethat is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the United State ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplitude
The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values. In older texts, the phase of a periodic function is sometimes called the amplitude. Definitions Peak amplitude and semi-amplitude For symmetric periodic waves, like sine waves or triangle waves, ''peak amplitude'' and ''semi amplitude'' are the same. Peak amplitude In audio system measurements, telecommunications and others where the measurand is a signal that swings above and below a reference value but is not sinusoidal, peak amplitude is often used. If the reference is zero, this is the maximum absolute value of the signal; if the reference is a mean value ( DC component), the peak amplitude is the maximum ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taylor's Bay
Taylor's Bay is a settlement located east of Lamaline in the province of Newfoundland and Labrador, between Point au Gaul and Lord's Cove. On a 1744 French map the cove was noted as Baye de Tailleur. William and Martha Bonnell, who had moved from Lamaline, are noted as the first settlers to the community. The Taylor's Bay population was 82 in 1921. Its population had fallen to 74 in 1956, and was down to 13 by 1991 (out of a subdivisional remainder of 20), to 8 in 1996 (the entire 'between communities' population), and to 5 by 2001 (again, the entire remainder population of the subdivision (2G)). The population then rose, however, by the 2006 census to 10 (again, the remainder population). The same figure of 10 was reported in 2011, and again in 2016, and rose again in the 2021 census to 25 (remainder population). The local post office was closed on September 13, 1966. 1929 Tsunami Taylor’s Bay was one of the forty small communities directly affected by the 1929 Grand B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turbidity Current
A turbidity current is most typically an Ocean current, underwater current of usually rapidly moving, sediment-laden water moving down a slope; although current research (2018) indicates that water-saturated sediment may be the primary actor in the process. Turbidity currents can also occur in other fluids besides water. Researchers from the Monterey Bay Aquarium Research Institute found that a layer of water-saturated sediment moved rapidly over the seafloor and mobilized the upper few meters of the preexisting seafloor. Plumes of sediment-laden water were observed during turbidity current events but they believe that these were secondary to the pulse of the seafloor sediment moving during the events. The belief of the researchers is that the water flow is the tail-end of the process that starts at the seafloor. In the most typical case of oceanic turbidity currents, sediment laden waters situated over sloping ground will flow down-hill because they have a higher density th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Columbia University
Columbia University in the City of New York, commonly referred to as Columbia University, is a Private university, private Ivy League research university in New York City. Established in 1754 as King's College on the grounds of Trinity Church (Manhattan), Trinity Church in Manhattan, it is the oldest institution of higher education in New York (state), New York and the fifth-First university in the United States, oldest in the United States. Columbia was established as a Colonial colleges, colonial college by royal charter under George II of Great Britain. It was renamed Columbia College (New York), Columbia College in 1784 following the American Revolution, and in 1787 was placed under Trustees of Columbia University in the City of New York, a private board of trustees headed by former students Alexander Hamilton and John Jay. In 1896, the campus was moved to its current location in Morningside Heights and renamed Columbia University. Columbia is organized into twenty schoo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Pierre Island
Saint Pierre Island, also spelt as Saint-Pierre Island, is one of the three main islands of Saint Pierre and Miquelon. It contains the town of Saint-Pierre, which lies on the island's east coast and is the main population centre of the island group. It is part of an overseas collectivity of France, and is located near the Canadian province of Newfoundland and Labrador. Location Saint Pierre Island is situated south of Newfoundland in the Gulf of Saint Lawrence in the North Atlantic Ocean. Its distance north–south from Newfoundland is . The islands are even closer to the long Burin Peninsula, which is situated just to the east. In addition, Green Island, which belongs to Newfoundland, is located about halfway between the southern part of Miquelon-Langlade and Newfoundland at , only from both Langlade and St. Pierre. Geography Several smaller islands lie off the coast of Saint Pierre, notably L'Île-aux-Marins and L'Île-aux-Vainqueurs, both to the east, and Grand Colo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overseas Territory (France)
The term overseas territory (, TOM) is an administrative division of France and is currently only applied to the French Southern and Antarctic Lands. The division differs from that of overseas department and region ( or DROM), but because of some common peculiarities, DOMs, TOMs and other overseas possessions under other statuses are often referred to collectively as '. Unlike the British Overseas Territories, which are not constitutionally parts of the United Kingdom or its national territory, they are integral parts of the French Republic. Former overseas territories * New Caledonia, from 1946 to 1999, now a ''sui generis'' collectivity * French Polynesia, from 1946 to 2003, now an overseas collectivity * Saint Pierre and Miquelon, from 1946 to 1976 and 1985 to 2003, now an overseas collectivity * Wallis and Futuna, from 1961 to 2003, now an overseas collectivity * Mayotte, from 1974 to 2003, now an overseas department * French Territory of the Afars and the Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic City, New Jersey
Atlantic City, sometimes referred to by its initials A.C., is a Jersey Shore seaside resort city (New Jersey), city in Atlantic County, New Jersey, Atlantic County, in the U.S. state of New Jersey. Atlantic City comprises the second half of the Atlantic City-Hammonton, New Jersey, Hammonton metropolitan statistical area, which encompasses those cities and all of Atlantic County for statistical purposes. Both Atlantic City and Hammonton, as well as the surrounding Atlantic County, are culturally tied to Philadelphia and constitute part of the larger Philadelphia metropolitan area or Delaware Valley, the nation's Metropolitan statistical area, seventh-largest metropolitan area as of 2020. Located in South Jersey on Absecon Island and known for its taxis, casinos, nightlife, Boardwalk (entertainment district), boardwalk, and Atlantic Ocean beaches and coastline, the city is prominently known as the "Las Vegas of the East Coast" and inspired the U.S. version of the board game ''M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halifax, Nova Scotia
Halifax is the capital and most populous municipality of the Provinces and territories of Canada, Canadian province of Nova Scotia, and the most populous municipality in Atlantic Canada. As of 2024, it is estimated that the population of the Halifax Census Metropolitan Area, CMA was 530,167, with 348,634 people in its urban area. The regional municipality consists of four former municipalities that were Amalgamation (politics), amalgamated in 1996: History of Halifax (former city), Halifax, Dartmouth, Nova Scotia, Dartmouth, Bedford, Nova Scotia, Bedford, and Halifax County, Nova Scotia, Halifax County. Halifax is an economic centre of Atlantic Canada, home to a concentration of government offices and private companies. Major employers include the Canadian Armed Forces, Department of National Defence, Dalhousie University, Nova Scotia Health Authority, Saint Mary's University (Halifax), Saint Mary's University, the Halifax Shipyard, various levels of government, and the Port of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azores
The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atlantic Ocean, about west of Lisbon, about northwest of Morocco, about southeast of Newfoundland, Canada, and the same distance southwest of Cork, Ireland. Its main industries are agriculture, dairy farming, livestock, fishing, and tourism, which has become a major service activity in the region. In the 20th century and to some extent into the 21st, they have served as a waypoint for refueling aircraft flying between Europe and North America. The government of the Azores employs a large percentage of the population directly or indirectly in the service and tertiary sectors. The largest city of the Azores is Ponta Delgada. The culture, dialect, cuisine, and traditions of the Azorean islands vary considerably, because these remote island ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anisotropy
Anisotropy () is the structural property of non-uniformity in different directions, as opposed to isotropy. An anisotropic object or pattern has properties that differ according to direction of measurement. For example, many materials exhibit very different physical or mechanical properties when measured along different axes, e.g. absorbance, refractive index, conductivity, and tensile strength. An example of anisotropy is light coming through a polarizer. Another is wood, which is easier to split along its grain than across it because of the directional non-uniformity of the grain (the grain is the same in one direction, not all directions). Fields of interest Computer graphics In the field of computer graphics, an anisotropic surface changes in appearance as it rotates about its geometric normal, as is the case with velvet. Anisotropic filtering (AF) is a method of enhancing the image quality of textures on surfaces that are far away and viewed at a shallow angle. Older ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
